Backlash Inspection and Adjustment

^ Tools Required
- J 8001 Dial Indicator Set
- J 25025-1 Dial Indicator Stand
- J 34047 Gear Lash Gauge
- J 33792 Side Bearing Adjuster Socket
- J 42213 Side Bearing Adjuster Socket





Notice: Refer to Fastener Notice in Service Precautions.

1. Tighten the right sleeve using the J 33792.
^ Tighten the right sleeve to 140 Nm (103 ft. lbs.).





2. Tighten the left sleeve using the J 42213.
^ Tighten the left sleeve to 140 Nm (103 ft. lbs.).





3. Mark the location of the adjusting sleeves in relation to the carrier halves (1), in order to count the notches in the adjusting sleeves when turned.
4. Turn the right adjusting sleeve out two notches using the J 33792.
5. Turn the left adjusting sleeve in one notch using the J42213.
6. Rotate the pinion several times in order to seat the bearings.





7. Install the J34047, the J25025-1, and the J8001.
8. Place the indicator stem at the heel end of a tooth.
9. Move the case through the case's free play while holding the pinion flange. Record the dial indicator reading.
10. Divide the dial indicator reading by two in order to obtain the actual backlash. For example, a dial indicator reading of 0.16 mm (0.006 inch) means that
there is actually 0.08 mm (0.003 inch) backlash.
11. Inspect and record the backlash at three or four points around the ring gear.
^ Hold the pinion stationary when checking backlash.
^ If the backlash varies more than 0.05 mm (0.002 inch), check for the following conditions:
- Burrs
- A distorted case flange
- Uneven bolting conditions
- Foreign matter between the case and the ring gear
^ Gear backlash should be between 0.08 - 0.25 mm (0.003 - 0.010 inch) with a preferred specification of 0.13 - 0.18 mm (0.005 - 0.007 inch).
^ If the backlash is incorrect, adjust the sleeves as necessary. Maintain one notch preload on the side bearings. For example, if the right sleeve needs to be turned out one notch, turn in the left sleeve one notch.
^ In order to increase backlash, turn the left sleeve in and turn the right sleeve out the same amount. In order to decrease backlash, turn the right sleeve in and turn the left sleeve out the same amount.
12. When the backlash is correct, mark the position of the sleeves in order to keep the sleeves in the same location.